Robert Greenberg, M.D.
NPI 1376628032 · Emergency Medicine Physician · San Leandro, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Greenberg, M.D. is a Emergency Medicine Physician provider in San Leandro, CA (NPI 1376628032).
Provider details
- NPI number
- 1376628032
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A79081 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 23 | 23 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 23 | 23 |
| Ibuprofen | 14 | 14 |
| Diphth,pertuss(acell),tet Vacbrand: Boostrix Tdap | 13 | 13 |
| Doxycycline Monohydrate | 13 | 13 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 13 | 13 |
| Amoxicillin/Potassium Clav |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$35 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-25
- Last updated
- 2021-12-08
Frequently asked questions
- What is Robert Greenberg's NPI number?
- Robert Greenberg's National Provider Identifier (NPI) is 1376628032, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Greenberg's specialty?
- Robert Greenberg is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Greenberg located?
- Robert Greenberg's practice location on file with NPPES is 2500 Merced St, San Leandro, CA 94577-4201.
- What is Robert Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Robert Greenberg is (510) 454-1000.
- Does Robert Greenberg accept Medicare?
- Robert Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Greenberg's NPI active?
- Yes — Robert Greenberg's NPI (1376628032) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.